PROCESS AND SYSTEM FOR WHOLE TYRES AND PLASTIC COMPOSITES PYROLYSIS TO FUEL CONVERSION AND COMPOUND RECOVERY

摘要

Disclosed is a process for treating waste plastic materials such as whole tyres, coarsely cut tyres, large plastic pieces, plastic composites such as hoses or combinations of above into gases, liquids and solids by direct heating in a pyrolysis liquid (1) such as molten salt or molten metal. The pyrolysis system is constructed such that the segregation of the light and heavy materials occurs within the pyrolysis chamber. The carbon black is segregated from the pyrolysis vapours via a cyclone and fractions of carbon black may be obtained by installing a number of cyclones in series so that different qualities of carbon black may be produced. Diesel or other oils, steel, carbon black, ZnO and synthesis gas are recovered; all of which can be feed streams to other processes. This process avoids the inefficient procedure of cutting the tyres or other plastic composites into small pieces before treatment by pyrolysis and also recovers valuable components.

主权项

1. A system for recycling plastic feed materials such as whole or part tyres of various sizes, cut or un-cut or large plastic pieces or small plastic pieces or other plastic composites such as glass fibre reinforced plastics, metal coated plastics such as hoses and pure or mixed non-composite plastics or combinations thereof, the system comprising:
a module for charging said feed material into a charging vessel (29), said charging vessel (29) adapted to remove air from said feed material; a module for charging said feed material from said charging vessel (29) into a pyrolysis chamber (3) comprising a pyrolysis liquid (1); a module for allowing heavy and light solid pyrolysis products associated with said feed material to separate within said pyrolysis liquid (1) such that said light solid pyrolysis products separate to the top of said pyrolysis liquid (1); a module for removing the pyrolysis vapours and said light solid pyrolysis products via extractor (6) from the surface of said pyrolysis liquid (1); and a module for removing said heavy solid pyrolysis products from the bottom of said pyrolysis chamber (3) with removal device (16, 19).